Characterization of a large-format, fine-pitch CdZnTe pixel detector for the HEFT balloon-Borne experiment

Creators: Chen, C. M. Hubert; Cook, Walter R.; Harrison, Fiona A.; Lin, Jiao Y. Y.

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Abstract

We have developed a large-format CdZnTe pixel detector with custom, low-noise ASIC readout, for astrophysical applications. In particular, this detector is targeted for use in the High-Energy Focusing Telescope (HEFT), a balloon-borne experiment with focusing optics for 20-70 keV. The detector is a 24 X 44 pixel array of 498-µm pitch. As a focal plane detector, uniformity from pixel to pixel is very desirable. In this paper, we present the characterization of some detector properties for the 1056 pixels on the HEFT detector. These properties include electronic noise, leakage current, spectral resolution, and count rate.

Additional Information

© 2004 IEEE. Manuscript received November 16, 2003; revised June 28, 2004. This work was supported by the NASA Space Science "Supporting Research and Technology" (SR&T) Program under Grant NAG5-5398. The work of F. A. Harrison was supported by a Presidential Early Career Award, Grant NAG5-5322. The work of J. Y. Y. Lin was supported by the National Science Foundation under Grant DMR-020-4920. The authors would like to thank J. Burnham, B. Kecman, and J. Klemic for playing crucial roles in the fabrication and testing of the detectors. C. M. H. Chen would like to thank Dr. B. D. Ramsey for his suggestions during the conference.

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